Iran remains an enigma for the outside world.对于外界而言，伊朗仍是个谜。It is an enigma to me.它对我来说是个迷.To German intelligence, Major de Coverley was a vexatious enigma.对德国的情报机关来说, 德?科弗利少校是个老猜不透的谜....
他吃起东西来肚子像个无底洞。He's a bottomless pit as far as food is concerned.战争把许多青年男子吞进了它的无底洞.The war swallowed up many young men into its maw.嘴是无底洞.If it were not for the belly , the back might wear gold....